Augmented space recursion study of the effect of disorder on superconductivity
2009 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 79, no 22, 224204Article in journal (Refereed) Published
We present a real-space approach to study the effect of disorder on superconductivity. The method is based on augmented space formalism that goes beyond mean-field approximations for configuration averaging and effectively deals with the influence of configuration fluctuations of the neighborhood of an atom. In the regime of validity of Anderson's theorem our results for s- and d-wave dirty superconductors have excellent agreement with existing results. The formalism is extended and tested for random negative U Hubbard model. Having verified the reliability of our method we use it to study environment-dependent inhomogeneous randomness in disordered superconducting systems.
Place, publisher, year, edition, pages
2009. Vol. 79, no 22, 224204
Anderson model, dirty superconductors, d-wave superconductivity, fluctuations in superconductors, Hubbard model, recursion method
IdentifiersURN: urn:nbn:se:uu:diva-260229DOI: 10.1103/PhysRevB.79.224204ISI: 000267699300048OAI: oai:DiVA.org:uu-260229DiVA: diva2:846728